Home / 1,187,028.96-1,638,097.62-643,179.45

Finding the Fourth Proportional to 1,187,028.96, 1,638,097.62 and 643,179.45

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Solution

The fourth proportional to 1,187,028.96, 1,638,097.62 and 643,179.45 is: 887,586.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,028.96 : 1,638,097.62 = 643,179.45 : x
  2. Step 2: Convert to fraction form
    1,187,028.96/1,638,097.62 = 643,179.45/x
  3. Step 3: Cross multiply
    1,187,028.96x = 1,638,097.62 × 643,179.45
  4. Step 4: Simplify right side
    1,187,028.96x = 1,053,590,726,277.91
  5. Step 5: Solve for x
    x = 1,053,590,726,277.91/1,187,028.96
  6. Step 6: Final answer
    x = 887,586.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.